Cash-register



2 Sheets-Sheet l. C GARR CASH REGISTER.

(No Model.)

i No. 488,989. Patented Nov. 29, 1892.

. 2 VSheets--Sheet 2.

(No Model.)

C. CARR.,

CASH REGISTER. N0..486,98o. Patented Nov.- 29, 1892.

UNrTED STATES PATENT OFFICE.

CHARLES CARR, OF BOSTON, MASSACHUSETTS.

CASH-REGISTER.

SPECIFICATION forming part of Letters Patent No. 486,980, dated November 29, 1892.

Application nea June 8,1892.

To all whom t may concern:

Be it known that I, CHARLES CARR, a citizen of the United States, residing at Boston, county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in Cash-Registers, of which the following, together with the accompanying drawings, having reference-letters,herein referred to, is a full and exact description.

Referring to the drawings, Figure 1 is a sectional end elevation of a machine embodying my improvements, the section being taken just within and parallel to the left-hand end frame F' in Fig. 3, the upper portion of the machine being removed, as it bears no relation to my improvements. Fig. 2 is an enlarged end elevation of the adding device with the wheel g removed. Fig. 3 is a sectionalplan of the parts shown in Fig. l. Fig. 4 is an enlarged front elevation of the adding device. Fig. 5 is a sectional detail view of wheels g and 7i, showing their connections. Fig. 6 is a perspective view of one of the numeral-wheels and its attached parts. Fig. 7 is a perspective view of a numeral-wheel, its ratchet, and its operating-pawl. Fig. S is a perspective view of a pawl D' and its stop or locking bar a7. Fig. 9 isa detail view of cam g3, showing the notches therein to receive rollers h2.

The nature of my improvements relates to the total-addin g mechanism and a positive stop and lock for the lirst moving gears, and these improvements-are shown as applied to the machine illustrated and described in United States Letters Patent issued to Charles Carr February 9, 1892, and numbered 468,329 and 468,330.

In this machine keys K and K', being levers of the iirst order, are arranged in groups of nine, each group representing a distinct decimal place. As here shown, there are two of these groups, one representing the units or cent place, the other the tens or dime place. These keys, which are pivoted at a, Fig. 1, have tappets la and 7c' upon the rear ends, and these tappets vary in length each from its neighbors in proportion to the digital value of the keys. This variation will be readily understood by reference to Fig. l. Each group of keys is spanned by a bail or rocking yoke B and B' for K and K', respect- Seria-1 No. 436,018. (No model.)

ively. These bails are also pivoted at a, and

their rear ends normally rest against a stopbar a', fixed in the frames F and F', which frames support the entire machine by means of the longitudinal shafts and rods da' este, &c. The bails B and B' carry pivoted to them the pawls D and D', respectively, which pawls engage, respectively, with gears G and G', mounted loosely upon shaft a beside the bails. l (See Fig. 3.) rlhese gears are the first moving gears of the registering-train. A shaft a3 in front of and below shaft a carries looselymounted thereonthe gears g, g', h, and h', of Which g andg' mesh with and are driven by gears G and G', respectively. These gears g and g each have an extended hub upon'which is a flange g2, to which is tiXed a cam g3. (See Figs. 2 and 5.) Gears h and h' are loosely mounted upon said shaft d3 and are constructed with the large hubs h4 recessed to receive the cams g3. In the peripheries of these cams are three notches, deep enough at one end to allow the loose rollers h2 in said notches to just touch the internal periphery of hubs h4, and

the said notches taper gradually to nothing.

It is evident that if the cam and its gear are turned in the direction of the arrow in Figs. l or 2 that the rollers will Wedge into the notches against the periphery of hub h4, causing sufficient friction to drive the gear 7?. or h', as the case may be, while if either of said gears h or h' be turned by power applied` directly to them, and in the same direction, the rollers Will tend toward the deep portion of the notch and thus free the cam from friction, allowing the gears h or h to turn without turning or in any way disturbing the gears gand g'. This device permits the carrying process between numeral-wheels d and d' to be easily effected and makes the resetting ofthe numeral-Wheels easier to accomplish.

The operation so far is readily understoodthat is, when a key K is depressed the bail B corresponding to it being struck by the tappet lo is raised or turned through an angle corresponding to the digital value of the key, and when the bail is released it is carried down by force of gravity or springs and the pawl D pivoted thereon engages the teeth of gear G, and thus turns said gear through an anglecorresponding to the value of the key. It will be seen that this also applies to keys ICO K', bail B', pawl D', and gear G', and also that though the motion of bails B and B' vary in length according to the value of the keys, they always stop in the same position, resting on stop-bar a. Itis obvious that the motion of gears G and G' will be transmitted to gears 7L and h', respectively, by means of gears g and g' and the one-way friction driving mechanism already described.

0n the longitudinal shaft a, located in front of and slightly above shaft a3, Fig. l, are mounted the wheels et, d', d2, d3, d4, and d5 of the adding device. These Wheels bear upon their peripheries, as shown, two sets of digits, and will be called for convenience numeral-wheels. Of these the right-hand one, Figs. 3 and 4, is lettered CZ and represents the cents place, the next wheel d the dime place, and so on. The wheels d and d' have fixed upon the right-hand side the gears c and c', respectively, which mesh with and are driven by the gears 7i and h', respectively. Thus it will be readily seen that the keys K and K' drive their corresponding wheels in the adding device. As is readily understood the digits on the Iwheels appear consecutively at the sight-slot tu, and as the number9leaves the position beforethe said sight-slot it is necessary to carry one to the next wheel. This process of carrying is effected by the following means and in the following manner: Each of the numeralwheels (except the left-hand one d5) has `fixed to the left side a disk or wheel e, which has two teeth or camsfon its periphery, the remainder of the periphery being concentric with the axis of the wheels, and each of the numeral-wheels,except the first, has a ratchet r attached to the right side. Supported in the auxiliaryframes F2 and F3 is a shaft a5, parallel to shafts a3 and a4, upon which Aare pivoted the arms o, 0,02, 03,and 0*, upon each of which is a roller 19, which rests upon the periphery of the disks e upon a lower wheel, and upon the opposite side of which are the hooks s, said hooks acting with the teeth of the ratchets 7 of the next wheel'above. Now the cams fare so arranged in relation to the digits on the wheels that when the digit t) is at the sight-slot the inclined side of said cam is just starting under the roller p, so that as the digit 9 passes the sight-slot the cam f raises the roller p and the lever to which it is attached, and ther hook s, engaging the teeth of the ratchet r, turns the numeralwheel one tooth or the space of one digit, this process of carrying being repeated throughout the series of wheels. The object of having two sets of digits and two cams upon the numeral-wheels is to reduce lthe angular velocity of the said wheels.

It is desired at times to reset the adding device or rather to bring the numeral-wheels all to indicate 0, and the means by which `this is accomplished is as follows: To the lef t of each of the numeral-wheels is a disk m, keyed to shaft a4 and having a tooth m', which acts against a spring-pawl n, secured by a pin n' to the numeral-wheels. Thus, as is evident, if the shaft a4 is turned by the thumb-nut a in the direction of the arrow in Fig. 2, the friction of the pawl n. against tooth m will be sufficient to turn the wheel also. The turning of the wheel having been provided for itis necessary to have some device for stopping the wheels at the desired position. In front of and below the numeral-wheels is located a longitudinal shaft a, supported by the auxiliary frames F2 and F3, upon which is pivoted a rocking frame u, having a handle 103 and hooks uf, said hooks being in the same vertical plane as the pins n', but normally just out of the path of said pins. Now when it is desired to reset the numeral-wheels the handle ui" is raised, turning rocking frame u on its pivots and bringing the hooks it into the paths of the pins n', when, if the wheels are caused to turn, as above, the pins n' strike the hooks u, and the spring-pawls In slip over the teeth m', allowing the shaft to go on after one wheel is stopped or until all the pins are brought against the hooks, and as the pins are located in proper relation to the 0 on the wheels the said figure O will be brought to the sight-slot. Now it is desirable to hold the pawls s away from the `ratchets during this process of resetting, and to accomplish this a bar t is provided, which has `fixed thereon spring-fingers s2 inthe plane of the hooks s but normally just removed from the arms s of said pawls s. This bar t is slotted and serves as a-guide for the levers oo, the., and is supported by rocking arms t, pivoted upon the frames F2 and F8 and in the lower endsof which are pins 2, which work in cam-slots u2 in the extended arms u'of rocking frame u. Now when the handle u is raised the arm u' is depressed, and the camslots u2 being properly inclined push the pins t2 backward, rocking the arms t, and bringing the har t forward, so that the spring-fingers s2 strike the arms s of hook-pawls s, swinging them out of engagement with the teeth of ratchets r', as shown by dotted lines in Fig. 2.

Any Vretrograde movement in wheels d, d', d?, cl3, di, and d5 is prevented by the counterweighted pawls r, pivoted on shaft a5 and acting against the teeth of ratchet-wheels fr'.

It is desirable in machines of this class that the first moving gear should be positively stopped and locked in the position lto which it is carried by the driving-pawl. In the drawings I have shown a lock-bara", having vertically-projecting locks or arms as for this purpose. rlhe `driving-pawls D and D are constructed with an inwardly-projectingarm D2, against which aspring D3 or its equiva lent acts Vto keep the pawls in engagement with the `teeth of the gears, `and the lock-bar a7 is so located that when the hails B and-B', with the pawls D and D' ,are in their normal or starting position--t'. e., resting on the stopbar a -the locks a3 on bar aT stand just under the armsD2 on the pawls, preventing the pawls from swinging out of engagement with the teeth of the gears until the bails are raised. As is obvious, this forms a positive stop and lock for the first moving gears G and G.

A suitable case of wood or metal and of useful or ornamental design may surround and inclose the working parts.

Having described my improvements, what I claim isl. In a registering-machine having an adding mechanism in which the process of carrying is eected by means of cam-disks fixed to the numeral-wheels of lower value, each acting to lift a lever and hook-pawl, said hookpawl engaging the teeth of a ratchet-wheel attached to the next higher numeral-wheel, thus turning said higher numeral-wheel through one units-space during the movement of the lower wheel through each tenth unitsspace, the combination of key-levers arranged in groups or banks, each group representing a different decimal place, a bail or yoke spanning each group and operated by the keys of said group, a driving-pawl pivoted on each of said bails and each engaging the teeth of a separate main d riving-gear, said driving-gears, the above-described adding mechanism, and suitable intermediate one-Way driving mechanism connecting each of said main drivinggears to its corresponding numeral-wheel in the adding mechanism, all operatin g together, substantially as and for the purpose set forth.

2. rl`he combination of keys K, bail B, pawl D, gears G and g, gears h and c, the one-way driving mechanism connecting gears g and h, numeral-wheel d, to which said gear c is attached, disk e, also attached to the numeralwheel d and having upon its periphery the cam f, said cam, lever o, having roller p running on disk e, said roller, a hook-pawl s, pivotally attached to said lever, and ratchet fr', attached to numeral-wheel d and engaged by the said hook-pawl and said numeral-Wheel d', all arranged and operating together, substantially as set forth.

3. The combination of the numeral-wheels, the shaft at, upon which the numeral-Wheels are loosely mounted, the disks m, keyed to the shaft and having each a tooth m', the spring-pawls n, fixed upon the numeral-Wheels by means of pins n', said pins, the rocking frame u, having hooks a4 formed thereon, and

said hooks, substantially as and for the purpose set forth.

4t. The combination of the adding mechanism herein described, the resetting device therefor and the rocking arms t, cross-bar t', its attached spring-fingers s2, the pins t2 in the said rocking arms, the arms u', having camslots u2, which from the connection with and by the action of the resetting mechanism act through and by means of pins t2, arms t, bar t', and Iingers s2 to disengage the carryingpawls of the adding mechanism, substantially as described.

5. The combination of the numeral-wheels, the ratchets r', shaft d4, disks fm, having teeth m', spring-pawls n, pins n', rocking frame u, hooks n4, arms u', cam-slots u2, pins t2, arms t, cross-bar t', spring-lingers s2, and pawls s, having arms s', and said arms, all substantially as and for the purpose set forth.

6. In a registering-machine in which the rst-moving gears are operated by the action of pawls carried by bails which have been raised and allowed to fall by the action of finger-keys, the movement of the said bails and pawls always stopping in the same position resting against a fixed stop-bar, the combination of keys, bails, pawls, gears, the stopbar, and arms'formed upon each of said pawls with fixed locks, which are so located that when the bails and pawls are in the resting position they act against the arms on the pawls and prevent the said pawls from swinging out of engagement with the teeth of said gears, thereby forming a positive stop and lock for said gears, substantially as described.

7. The combination of the fixed pawl-lock a8, arm D2, fixed to pawl D, bail B, carrying pawl D, said pawl D, lever K, spring D3 or equivalent pawl-mover, and the xed stop-bar a', for the purpose of giving a specific and definite movement to the wheel G', substantially as described.

8. The fixed lock d8, in combination with pawl-arm D2, and pawl D, for the purpose of locking the said pawl D in its engagement with gear G while at rest, substantially as described.

CHARLES CARR.

Witnesses:

HOWARD L. COBURN, F. M. HooPER. 

